GitLab

Fix the promise for the `default` software type, where it would listen on the partition's IPv6 address regardless of the value of the bind address passed to `fluentd`.

Now, the `fluentd` promise listens on its bind address if the parameter is defined,
or listens on the partition's IPv6 otherwise, which is the new default value for the bind address parameter.

/reviewed-on nexedi/slapos!1824